In era in which the cost of IBD patients is monitored, it seems that there is a change in pattern of healthcare costs. In the current study we aimed to assess the in-hospital costs of IBD over a period (2015- 2021) and identify predictors of higher patient payment and total hospital costs in hospitalized IBD patients.

This cross sectional study was accomplished in three hospitals of Iran. For the study purpose, the IBD admitted patients’ demographic and clinical information as well as cost data were determined. Two non-parametric statistical procedures, classification and regression trees (CART) and quantile regression forests (QRF), were employed to identify the main factors related to hospital costs of IBD (dependent variable).

during 7 years 930 admissions were occurred in these three hospitals. 22.3 percent of patients (138 of 619) were readmitted and 306 patients (49.4%) were male. The mean of age was 33 (SD=18.9) years. 454 patients (73.3%) had UC, and 165 patients (26.7%) had CD. Length of hospital stay was the most important variables related to hospital costs of IBD in models followed by age.

this study showed that there may be differences in hospital cost of IBD patients based on Hospital they are admitted. LOS and age were predictors of hospital cost in IBD in this study group.